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J. J. CARR. SAND SIFTING MACHINE.

Patented Feb. 21. 1888.

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(No Model.) 3 Sheets-Sheet 2. J. J. CARR.

SAND SIFTING MACHINE.

No. 378,129. Patented Feb. 21, 1888.

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(No mad. 3 Sheets--Sheet 3. J. J. CARR. SAND SIFTING MACHINE. No.378,129. Patented Feb. 21, 1888.

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lhvrrsn Srnrns JOSEPH J. CARE, OF lVILlIES-B; Bill d PENNSYLVANIA,ASBIGNOR OF ONE- HALF TO DOll IINIG F. SYVEENEY, OF SAME PLACESAND-=SlFTlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 378,129,6lated February21,1888.

Application filed Ill-arch 31, 1887. Serial No. 233,138. (No model.)

To all 2071,0712 it may concern:

Be it known that I, Josnrn .T. Gill-1n, of \Vilkes-l-larr, in the countyof Lnzerne and State of Pennsylvania, have invented certain new anduseful Improvements in Sand-Sifting Machines; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to an improvement in sand-sifting machines.

On the 12th day of February, 1887, I filed an application for patent onan improved sandsifting apparatus, in which device rotary agitators weremade to have a spring-bearing upon the surface of a stationarycylindrical screen of wire-cloth.

The object of my present invention is toinr prove the construction ofthis sand-sifting device by the provision of practical features whichare not therein shown.

\Vith this object in view my invention consists in certain features ofconstruction and combinations of parts, that will be hereinafterdescribed, and pointed out in the claims.

Referring to the drawings making a part of this specification, Figure 1is an end elevation of the improved sand-sifting machine. Fig. 2 is aview of the opposite end of the siftinginaehine. Fig. 3 is an endelevation of the machine mounted upon a frame and wheels to permit ilstransportation from one point to another. Fig. i is a side elevation insection of the sand-sitter. Fig. 5 is a view of the screen removed fromthe machine. Fig. (3 is a view of a screen-s11 pporti ng roller removedfrom the sifting apparatus. Fig. 7 is a side or edge View of the screenmaterial, showing the manner of Connecting two sections,

in Figs. 1 and i3, 3 represents the end portions of the frame of themachine, which have ach a central hub perforated for the reception ofshaftjournals c. The edges of the framepicccs are each made integralwith cylindrical flanges (l, and also have depending flanges B, cast toproject from the lower portions of the latcrally-projecting flanges G.(See Fl i.) The upright brackets c c are formed upon the upper surfaceof the cylindrical flanges G.

The end plates, 13, are held in rigid connection by the bolts 1 2 3 4,which have securing-nuts adjusted to bear upon each side of the plates Band the lower part of the upright brackets c c, in which holes are madefor the insertion of these bolts.

The shaft I is supported at its ends a to revolve in the end plates, B.The circular flanges A. A are mounted upon this shaft and secured inplace by jam-nuts g g, which are placed on the threaded body of theshaft I at proper points to engage the sides of the plates, as shown inFig. 4, and it will be seen that the flanges A A are preferably locatedto rest in the same vertical plane with the inner edges of thecylindrical flanges O, which will afford sufficient space to intervenebetween these flanges and the end plates, B.

The flanges A A are perforated at spaced intervals, I), (see Figs. 1 and2,) to receive the sand-agitators J, which are bent at their ends toform cranks of equal throw, the journaled ends of which enter theperforations b and are permitted to vibrate in these bearings.

Upon the upper ends of the bracket-arms c c the rollers L L are looselymounted to rotate in holes made for their reception in these arms. Theserollers are provided to receive and sustain the screeuwire sections G G,which are rigidly attached by their free ends to the the nuts of theclamping-bolts 3 being embed (led in recesses in the rollers to preventin j urious abrasion of the wire screen when it is wrapped around theroller The screen G is preferably made in several sections, as shown inFig. 5, which are connected by hooking their folded edges into the bentedges of plates D, which are similarly folded to produce hooks on theirparallel sides, the connection thus effected being secured fromdisplacement by the insertion of the bolts D, the T-heads of which havea bearing upon the outer surface of the screen-wire cloth at the joinedhooked edges of the several sections to render them continuous.

Vhen the screenG G is mounted on the rollers L L, the slack material iswrapped upon the bodies of said rollers, the edges of the screen havinga contact with the cylindrical flanges 10f rollers by clamping-bolts, asshown in Fig. 6,

0, the contactj ust mentioned hgldingthe screen in c nnnrrearifont;wi'th'the interior surface of thesa'nfe clear of all obstructions? Thescreening-cloth is made to bear upon the longitudinal bolts 3 4, thatare inserted in the upright brackets c 0. Upon the rotation of therollers L the screen is drawn tightly and held so by the locking actionof the pawls p with the ratchetwlneels H, which are rigidly secured uponthe outer ends of the rollers Lin proper position to permit such anengagement of the pawls, as shown in Fig. 1.

The agitator-bars J are provided with regulating-levers c, which areattached to the outer ends of the crank ends b, that project through theflanges A A, the levers 6 having springs e fastened to their free endsand adapted to hold said levers in contact with eccentrics F, which aremade to bear upon the levers and regulate the relative position of thescraper portions m of the agitator-bars J with regard to'the interiorsurface of the screen G. It is apparent that by the adjustment of thecams F these bars J may be made to have a clearance space providedbetween their scraperedges m and the opposed surface of the screen or becaused to lie upon this screen, as is de sired.

The yielding action of the springs 0 will afford a proper relief to thebars when a rigid impediment-such asiron scrap-is lodged in the screen,and thus injury to the wire-netting of the screen is avoided.

Ascrap-box, O, is fixed to one end of the frame 13, preferably at thecenter, to receive the scrap-iron or other refuse matter thataccumulates in the screen. This material can be removed by loosening oneof the rollers L, to produce a slackening of the screen materialopposite the scrapbox, and if the machine is tipped or inclined to causethe debris in the screen to slide toward the box 0 it will enter it andfree the screen of the same. The roller can then be revolved to tightenthe screen and work be resumed, the operation of removalof the scrap orother refuse occupying but a few minutes.

The rollers L and center shaft, 1, are pro-v vided with cranks tooperate them. The shaft I may have fast and loose pulleys secured inplace to drive it and its attached screening mechanism if a stationarysiftingmachine is to be employed.

This sand-sifting machine may be made portable by the provision of aframe, E, that is preferably aiiixed to the lower portions of the endplates, B, of the machine, to afford a means of securing an axle, E,thereto, the wheels 1?, which are mounted on the axle torevolvethereon,forming a transporting device which will permit theremoval of the machine to any desired pointfor use.

It is evident that screens of'different sizes of il y removed, andrepairs be thus made to the screen in an expeditious manner.

Slight changes-might be made in the constructive features of this devicewlthout departure from the spirit and scope of the inven-' tion. I donot therefore desire to restrict myself to the exact forms shown; but,

Having fullydescribed my inventiomwhat I claim as new, and desire tosecure by Letters Patent, is-

1. In a sand'sifting machine, the combination, with two end plates, tworollers mounted on the end plates, 2. screen secured to these rollers,and an adjustable means of holding the rollers from rotation, of acenter shaft mounted to rotate, two circular flanges secured to theshaft, and sand-agitator bars pivoted in these flanges, substantially asset forth.

2. In a sand-sifting machine, the combination, with two end plateshaving projecting flanges and longitudinal connecting-bolts andjam-nuts, a center shaft, circular flanges, and sand-agitatorsadjustable with regard to the screen, of a screen, two supportingrollersat tached to the screen, and a means of securing the rollers fromrotation, substantially as set forth.

8. In ascreen for a sand'sifting machine, the combination, with thesections of screennetting or wire cloth formed with bent or hookededges, of connecting-plates having corresponding hooked edges to engagethe edges of the wire-cloth and clamping-bolts that pass through theseattached hooked portions to bind them together, substantially as setforth.

4:. In a sand-sifting machine, the combination, with two end plates,longitudinal securing-bolts, a screen, and two rollers adapted to holdthe screen in stretched condition, of a center shaft, two circularflanges, sand-agitators having cranks on their ends pivoted to swing inholes in said flanges, levers fixed to the pivot ends of these cranks,cams that are adapted to move the scraper-edges of the agitators towardand from the screen, andsprings attached to the levers to permitayielding ac tion of the sand-agitators, substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

JOSEPH J. CARR. Witnesses:

P. G. SHERIDAN, H. F. ll/IOONEY.

